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Finding the Fourth Proportional to 2,489.78, 3,735.31 and 734.71

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Solution

The fourth proportional to 2,489.78, 3,735.31 and 734.71 is: 1,102.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,489.78 : 3,735.31 = 734.71 : x
  2. Step 2: Convert to fraction form
    2,489.78/3,735.31 = 734.71/x
  3. Step 3: Cross multiply
    2,489.78x = 3,735.31 × 734.71
  4. Step 4: Simplify right side
    2,489.78x = 2,744,377.53
  5. Step 5: Solve for x
    x = 2,744,377.53/2,489.78
  6. Step 6: Final answer
    x = 1,102.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.